RESPUESTA AGRO PRODUCTIVA DE NUEVAS VARIEDADES DE Cenchrus purpureus | AGRO PRODUCTIVE RESPONSE OF NEW VARIETIES OF Cenchrus purpureus

"Con el objetivo de evaluar el comportamiento agro productivo de nuevas variedades de Cenchrus purpureus (CT-601, CT-603, CT-605, CT-608, CT-609 y CT-115 como control) en diferentes edades de rebrote (60, 90, 120, 150 días) en la época lluviosa, se desarrolló un estudio en un diseño de bloques al azar en arreglo factorial (6×4) en variables productivas y agronómicas. Se observó el mayor (P≤0,001) rendimiento de Materia Verde a los 120 días de edad en el CT-605 (22,8 tha-1), similar comportamiento para el rendimiento de materia seca (5,41tha-1 MS) para variedad y edad, para esta última variable no se observaron diferencias con respecto al control dentro de las diferentes edades. La mayor altura de la planta se observó a los 150 días en la variedad CT-608 (110,7cm), esta variable no mostró diferencias significativas con respecto al control (93,36cm), el ancho de la hoja se vio favorecido en todas las variedades a la edad de 120 días y en el resto de las edades no se observaron diferencias significativas (P≥0,001). Las variables, número de nudos, longitud de la hoja, grosor del tallo y longitud del cuarto entrenudo no se vieron afectadas por la interacción de segundo grado. Las nuevas variedades en la época lluviosa del Valle del Cauto manifiestan una respuesta productiva de MS que oscila entre 1,01 y 5,41 t ha-1, con marcadas diferencias entre las edades y variedades que se uniforman a los 120 días. Todas son potenciales productoras de forrajes en las condiciones del Valle del Cauto, Cuba."

"With the objective of evaluating the agro productive behavior of new varieties of Cenchrus purpureus (CT-601, CT-603, CT-605, CT-608, CT-609 and CT-115 as control) in different ages of regrowth (60, 90, 120, 150 days) in the rainy season, a study was developed in a random block design in factorial arrangement and interaction of the factors (6×4) in the productive and agronomic variables. The highest (P≤0,001) yield of Green Matter at 120 days of age was observed in CT-605 (22,8tha-1), similar behavior for dry matter yield (5,41tha-1 DM) for variety and age, for this last variable no differences were observed with respect to control within different ages. The highest height of the plant was observed at 150 days in the variety CT-608 (110,7cm), this variable did not show significant differences with respect to the control (93,36cm), the width of the leaf was favored in all the varieties at the age of 120 days and in the rest of the ages no significant differences were observed (P≥0,001). The variables, number of nodes, leaf length, stem thickness and internode quarter length were not affected by the second degree interaction. It is concluded that the new varieties in the rainy season of the Cauto Valley show a favorable productive response that resembles the CUBA CT-115 parent. Its use is recommended between 90 and 120 days of regrowth. The new varieties in the rainy season of Valle del Cauto show a productive response of DM that ranges between 1.01 and 5.41 t ha-1, with marked differences between the ages and varieties that become uniform after 120 days. All are potential forage producers in the conditions of Valle del Cauto, Cuba."